#679 Sitemap: optimized getting of child nodes
Merge branch 'dev' of github.com:devbridge/BetterCMS into dev

Conflicts:
	Modules/BetterCms.Module.Pages/Command/Sitemap/GetSitemap/GetSitemapCommand.cs
#676 Added access control sub-form, when cloning page
#676 Fixed clone page command tests
#680 Media: fixed renaming of media, when exception occurs
#682 When opening denied media, throwing an exception; after uploading read only media, returning readonly flag
#684 NuGet packages: removed licenses, added config transformations, tested on new project
Merge branch 'master' into dev